Update of /usr/cvsroot/asterisk
In directory mongoose.digium.com:/tmp/cvs-serv665
Modified Files:
frame.c
Log Message:
add API function to perform volume adjustment on a frame of SLINEAR data
documentation cleanup
Index: frame.c
===================================================================
RCS file: /usr/cvsroot/asterisk/frame.c,v
retrieving revision 1.65
retrieving revision 1.66
diff -u -d -r1.65 -r1.66
--- frame.c 24 Oct 2005 20:12:05 -0000 1.65
+++ frame.c 28 Oct 2005 16:20:44 -0000 1.66
@@ -1252,3 +1252,22 @@
return len;
}
+
+int ast_frame_adjust_volume(struct ast_frame *f, int adjustment)
+{
+ int count;
+ short *fdata = f->data;
+
+ if ((f->frametype != AST_FRAME_VOICE) || (f->subclass !=
AST_FORMAT_SLINEAR))
+ return -1;
+
+ for (count = 0; count < f->samples; count++) {
+ if (adjustment > 0) {
+ fdata[count] *= abs(adjustment);
+ } else if (adjustment < 0) {
+ fdata[count] /= abs(adjustment);
+ }
+ }
+
+ return 0;
+}
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